jack pot

Webster's Dictionary (1913)

Poker Playing, the name given to the stakes, contributions to which are made by each player successively, till such a hand is turned as shall take the “pot,” which is the sum total of all the bets. See also jackpot.

From the entry Jack.

. See under 2d Jack.

From the entry Pot.

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54